- Patients must not be taking, nor plan to take while on protocol treatment, strong CYP3A4 inhibitors (e.g. boceprevir, cobicistat, danoprevir, elvitegravir/RIT, fluvoxamine, indinavir, itraconazole, ketoconazole, lopinavir/RIT, nefazodone, nelfinavir, posaconazole, ritonavir, telaprevir, telithromycin, tipravavir/RIT, or voriconazole); strong CYP3A4 inducers (e.g. avasimibe, phenytoin, rifampin, rifabutin); potent inhibitors of CYP1A2 (e.g. ciprofloxacin); and/or drugs known to be CYP3A4 substrates with a narrow therapeutic range (e.g., diergotamine, ergotamine) within 14 days prior to randomization; moderate inhibitors or inducers of isoenzyme CYP3A4 should be avoided, but if necessary can be used with caution